Bicycle



FIG. 1 is a front perspective view of a bicycle embodying our new design;

FIG. 2 is a side elevational view thereof showing the side opposite that side shown in FIG. 1;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof; and

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a bicycle, substantially as shown. 